Oh I am sorry IfItAintBoeing, if I was unclear. No, the trip to SEA/LHR/ZRH is in Feb/Mar, the trip to DUS is in June.
We usually don't really travel much in the summer because we so much love to be in Seattle during the beautiful summer weather, but we are going to the party in DUS and want to plan ahead if we can. Last year we did our summer trip to DUS on our Concorde award. This year is will be Lufthansa, unless we get some wonderful fare somewhere along the way.